P1467 — BMW — Heated Catalyst Comparison Battery Voltages of Power Switches Plausibility

P1467 (BMW): Heated Catalyst Comparison Battery Voltages of Power Switches Plaus… — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Heated Catalyst Comparison Battery Voltages of Power Switches Plausibility. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Powertrain

Symptoms

  • Check Engine light illumination
  • Stored diagnostic trouble code
  • Failure of the secondary air system to activate
  • Increased vehicle emissions

Possible causes

  • Faulty heated catalyst control module
  • Corroded or damaged wiring harness to the heating elements
  • Internal failure of the catalyst heating relay
  • Short circuit in the catalyst power switch circuit

What to check

  • Inspect the catalyst power relay for physical damage or internal contact failure
  • Measure voltage supply at the heating element terminals to ensure proper power delivery
  • Check the wiring harness for continuity and shorts to ground between the module and catalyst
  • Test the catalyst heating circuit resistance to rule out open heating elements
  • Perform a component activation test using a professional diagnostic scan tool